Coal charging hopper for coke ovens



H. KOPPEIRS COAL CHARGING HOPPER FOR COKE OVEN S June 11, 1940.

Filed Nov. 19, 1937 Patented June 11, 1940 2,204,019

COAL CHARGING HOPPER FOR COKE OVENS Heinrich Koppers, Essen, Germany,assignor, by mesne assignments, to Koppers Company, Pittsburgh, Pa., acorporation of Delaware Application November 19, 1937, Serial No.175,380 In Germany November 20, 1936 2 Claims. (01. 214-45 The presentinvention relates to hoppers for charging coal or other suitable fuel ormixtures of fuels into coke ovens, for instance into horizontal chamberor retort ovens for the production Further objects and features of myinvention may be taken from the following description of a preferredembodiment thereof shown in the accompanying drawing, in which thesingle figure 5 of coke and gas, and more particularly to thoseillustrates a vertical section through one of the g hoppers which aremounted on a suitable lorry charging hoppers, built according to myinvenrunning over the top of the coke oven battery tion. V and which areprovided with two or more out- The charging device comprises a series oflets at the bottom, in order that the coal may be charging hoppers l,arranged side by side. For

fed into the even through the usual charging simplicity, only one of thehoppers is illustrated my openingsprovided therefor in the oven roof. onthe drawing. The charging device travels on It is a well-known fact thatthe diameter of the oven roof 2. The driving means have, howthe chargingopenings in the oven roof is deever, not been shown on the drawing.Several pendent on the width of the oven chamber. The charging holes 3are arranged in the oven roof 2.

diameter of the charging holes and also that of The hopper l is providedwith upper inclined is the outlet openings in the bunker of the coalsurfaces t, extending downwards to a lower spout charging lorry istherefore generally very small. 5, which is situated at a distancegreater than It is extremely difficult to discharge moist or, usuallyfrom the oven roof 2. It will be noted sticky coal at a higher velocitythrough the narfrom the drawing that the upper outlet 5 row bottomopenings of the charging hopper and measures of an inch or 3 as compared20 to fill it into the oven. In most cases, it is therewith 95 for thelower outlet H, and the upper fore necessary to do hand-poking work. Foroutlet 5 is at a distance substantially exeliminating any poking work,it has already been ceeding its 35 diametric dimension from thesuggested to equip the charging hoppers with top of the lower outlet ll.Thus it will be apmechanical stirring and scraping devices by parentthat the valve outlet 5, which has a free- 25 means of which the coaladhering to the bunker section larger than the connecting nozzle it,will be removed, so as to obtain a uniform and terminates above the topof the connectingnozzle rapid discharge. H at a distance substantiallygreater than its The main object of the present invention is to owndiametric dimension. Thelower spout ii,

provide such improvements in hoppers of coal which is closed by means ofsegmental valves 3, so charging lorries or the like, which will enable ais of such a large area, that the coal can be disproper and quickdischarge of the charging hopcharged when the valves are open, withoutcauspers in a very simple manner, without having ing any blocking. Thesegmental valves 6 are to use such expensive and complicated stirringoperated from the service platform 1 by means and scraping devices. oflever and rod 8. The bottom opening for the 9 The invention now consistsin that the lower hopper or bunker is constituted of a lower hopperbunker spout which is above the bottom outlet or bin 9 in which thelower spout 5 enters. The openings for the bunker, and from where thedischarging bin 9 is fixed to the hopper I by bunker enlarges towardsthe top, is provided with means of a ring plate I0 which is above thelower a larger diameter than the bottom bunker's outspout 5 and is oflarger diameter. At its bottom, 40 let opening the diameter of which isessentially the discharging bin 9 has a branch or nozzle with similar tothat of the charging holes. a sectional area similar to that of thecharging In order to ensure a quick discharge of the opening 3, so thatthe coal leaving the lower spout coal from the inner walls of thecharging hoppers 5, can be fed into the oven charging holes 3. The

or bunkers and further to avoid any corrosion increase in diameter ofthe outlet 5 over the out- 45 favoured by the sticking of the coal tothe walls, let H together with the substantially greater the slidingsurfaces of the charging hoppers are distance between the two, togetherwith the spaclined with sheet plates, made of zinc, aluminium ing ofhopper 9 with a substantial clearance from or asimilar, non-corrodingmaterial. The sliding hopper l, form in effect an expansion chamber.

surface must be smooth. These features in cooperation with each other in50 According to the present invention, the charging hopper or bunker isto be constructed in such a way that a proper discharge is obtained at ahigher velocity without any coal sticking to the walls.

conjoint use are effective to cause, especially in conjunction with thesmooth action of the inner lining, coal to flow when moist or sticky,through the valved-closed outlet 5 and lower hopper outlet II to thecharging hole 3 without sticking, 55

2 r tree frompoking and scraping andrwithout resort to obstructions inthe interiors of the hoppers.

The branch or nozzle II is surrounded by a movable mouth piece l3, whichcan be lowered down to the oven roof by means of lever and rod i2 beforecharging the oven with coal.

The inner,'inclined surfaces 4 of the charging hopper l are lined withsheet plates made of zinc, aluminium or another non-corroding material,in order to obtain a proper and quick discharge of the coal. 'The innersurfaces of the charging hopper 9 which come into contact with the coal,may also be covered with sheet-plates in a similar way.

I claim:

1. A coke-oven lorry coal-charging receptacle vcomprising: an upperhopper of comparatively large area at its upper part with lower inclinedsides tapering to and terminating in an unrestricted lower valve-closedoutlet; and a lower' hopper with similarly inclined tapered sidessurrounding the lower discharge valve-closedoutlet of the upper hopperwith a substantial clearance and terminating in a bottom connectingnozzle outlet to a coke-oven charging hole for connectv ing the lorryupper hopper with the charging hole; and in which the inclined slidingfaces of the tapered sides of the upper hopperare inner- .lined withnon-corroding sheet plates; and in which the valve-closed outlet has a.free-section larger than the connecting nozzle outlet, andterminstesabovethetepoitheeouneetingnoI-le at a distance substantiallygreater than its own diametric dimension as to cause, in conjunctionwith the smooth-action of the inner-lining, the coal material to flowwhen moist or sticky, through the valve-closed outlet and lower hopperto the charging hole without sticking, free from poking and scraping inthe hoppers, the interior of the hoppers and outlets being entirely freefrom obstructions.

2. A coke-oven lorry coal-charging receptacle comprising: an upperhopper of comparatively large area at its upper part with lower inclinedsides tapering to and terminating in an unrestricted lower valve-closedoutlet; and a lower hopper with similarly inclined tapered sidessurrounding the lower discharge valve-closed outlet of the upper hopperwith a substantial clearance and terminating in a bottom connectingnozzle outlet to a coke-oven charging hole for connecting thelorry upperhopper with the charging hole;

and iii-which the valve-closed outlet has a freesection larger thanthetconnecting nozzle outlet,

' and terminates abovethe top of the connecting 1 nozzle at a distancesubstantial y greater than its own diametric dimension as to cause thecoal materialto how when moist or sticky, through the valve-closedoutlet and lower hopper to the charging hole without sticking, free frompoking and scraping in the hoppers, the interior of the hoppers andoutlet being entirely free from obstruc- .0

tions.

HEINRICH KOPPERS.

